Machine for making wire-netting.



PATENTED SEPT. 20, 1904.

F. JOHANSON.

MACHINE FOR MAKING WIRE NETTING.

APPLICATION FILED 00T.17, 1903.

N0 MODEL.

1 N .N x l A} N N w 3 O 0 8 m H H H NNH m w wN J;

UNITED STATES Patented September 20, 1904. I

PATENT CFEicE.

MACHINE FOR MAKING WlRE-NETTING.

SPECIFICATION forming part of Letters Patent No. 770,722, dated September 20, 1904:. Application filed October 1'7, 1903. Serial No. 177,4;36. (No model.)

To all whmn it nuty concern:

Be it known that I, FRITZ J OHANSON, a subject of the King of Sweden and Norway, and a resident of South Windham, county of Windham, and State of Connecticut, have invented certain new and useful Improvements in Machines for Making VVire-Nettings, of which the following is a specification.

My invention relates to the coiling mechanism used in making and interweaving coiled wires in the manufacture of wire-netting consisting of flattened wire spirals screwed in each other; and it consists of the improved construction of the spiral die through which the wire is passed for coiling to regulate the gonlstriction of the coiling wire on the man- This construction is especially intended for facilitating the making of small coils of thick wire to provide strong and flexible net that can be used over small pulleys without destroying the coils, as hereinafter described, reference being made to the accompanying drawings, in which Figure 1 is a longitudinal vertical section of the coiling-machine. 1 Fig. 2 is an end elevation. Fig. 3 is a side elevation of the coiling-die. Fig. 4 is a transverse section of the coiling-mandrel. Fig. 5 is a detail of the wire web in transverse section on the line 5 5 of Fig. 1, showing small coils of wire of larger diameter. Fig. 6 is a side view of the mandrel detached from the rest of the machine.

A represents a spirally-grooved die of about three spiral coils, more or less, axially bored throughout its length with the bore and the groove communicating and secured by a clamp g in a fixed position in a supporting-standard (0, preferably in horizontal arrangement, with a rotating and slightly-twisted mandrel b, of hardened tool steel and of oval, flattened, or elliptic cross-section, or it may be substantially rectangular with rounded corners in the hollow axis for drawing in and coiling the wire 0 and discharging it in coils of flattened form, as shown at (Z in Fig. 5, the mandrel being in its largest diameter equal to the bore of the die and the twist of said mandrel being backward from butt to point and with relation to the direction of rotation. The mandrel b is carried by a rotating spindle e, mounted in a bearing-supportf and having a pulleyf or other approved means of driving it. The die has considerable radial extension from the bore outward in excess of the size of the wire for strength to prevent contraction of the bore by the clamp when screwed up. The side 7b of the spiral rib against which the wire draws in being forced along is formed on an angle of about thirty to forty degrees, varying for different sorts of iron, and must be varied, as found in practice, the most effective in carrying the wire freely and yet producing coils of definite shape. If the angle is less, the wire draws tightly and obstructively on the mandrel and if more the wire runs too slack and the desired definite shape of the coil is not secured. The other side of said spiral rib is preferably formed at right angles to the axis of the die. The twist of the mandrel may be varied as may be found best in practice. A tension-clamp 0 is employed to subject the wire to proper stress for coiling properly. To begin with, the wire is inserted in the die and coiled around the mandrel by hand sufficiently to feed after starting the mandrel. The effect of the twist of the mandrel is to prevent a slight twist in the plane of the flat coil that occurs with a mandrel not twisted through the recoil due to the resilience of the wire and which it is found in practice is not quite uniform along the coil and may be compensated by such twist of the mandrel.

Dies and inandrels of different sizes will be employed for coils of different sizes.

At j I have represented a wire-nettingsuspended on a drum is for taking it away, in illustration of the manner of producing nettings of such coiled wires, with a worm-gear Z m and a crank 01. for shifting the fabric along step by step, so that when the wire is inserted the proper length and is cut at the end of the mandrel another length will be inserted; but this is not new and is not claimed herein.

What I claim as my invention is Signed at Brooklyn, New York,- this 28th The colmbination of the spirally-grooved day of September, 1903. and axia ly-bored die and the flattened or elliptic rotating mandrel, the side of the rib FRITZ JOHANSON' 5 of the die against which the wire is drawn Witnesses:

formed on acute radial angularity to the axis ANDERs J. WIKANDER,

of the die. I JOSEPH BISHOP. 

